FSX Scenery--Grimes Airfield (8N1), Bethel, Pennsylvania (PA), USA. Grimes Airfield is home to the Golden Age Air Museum, a living museum dedicated to preserving aviation's golden past. This detailed photoreal scenery includes the airfield and surrounding countryside as well as ten flyable AI airplanes. Fly in on the weekend to watch these classic airplanes take to the sky. By Christopher G. Clawson.